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A134997 as a simple table

na(n)
12
21
32
42
51
614
740
852
9228
10482
111592
124758
1315810
1453202
15197429
16725196

[2,1,2,2,1,14,40,52,228,482,1592,4758,15810,53202,
 197429,725196]